What is a Marlin 30-30 Model 3080 Limited Edition worth?

That is basically a Marlin Glenfield Model 30 as made for the OTASCO chain of stores in Oklahoma. The model number is derived from the base model (30) and the year of sale (in this case 1980). It will have no additional value over a standard Marlin Glenfield Model 30 in equivalant condition, about $150 if excellent. sales@countrygunsmith.net